Carbonic acid esters, and the preparation thereof and their use

Details Carbonic acid esters, and the preparation thereof and their use Carbonic acid esters, and the preparation thereof and their use

C - Chemistry, Metallurgy

07

D

260/452, 260/750

C07D 207/16 (2006.01)

Patent

CA 1058198

ABSTRACT OF THE DISCLOSURE A process and novel carbonic acid ester for the protect- ion of amino and ?mino groups in amino and imino group - containing compounds is provided; the process comprises reacting an amino or imino group - containing compound with a crabonic acid ester of the formula: F1OCOOR2 wherein R1 is a lower alkyl which may have one or more substituents selected from the group of halogen, lower alkoxy and aryloxy, or ar(lower)-alkyl which may be unsubstituted or substituted with a substituant selected from the group of lower alkoxy ha??gen, nitro and cyano, and R2 is a group represented by the formula: Image wherein Y is aryl which may have substitutent(s) selected from the group of halogen, lower alkoxy, nitro cyano and halo(lower)alkyl, or an elctron withdrawing group and Z is aryl which may have substituents(s) selected from the group of halogen, lower alkoxy, nitro, cyano and halo(lower) alkyl.

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